Update! Unfortunately the brass benchmark disc has been stolen. But many cache puzzles can be solved in more than one way. If you're using a computer, try searching around the cache page for the needed info. On a phone, you'll need to do a Google image search.
Another cache in the Black Balsam series. Don't miss the other Black Balsam caches nearby. This one is a less than 1 1/2 mile round trip hike.